Forming-tool.



O. J. P. CRIGK.

FORMING TOOL.

APPLICATION FILED MAY19,1909.

966,658. Patented Aug. 9, 1910.

mlincsses. wig 52%]? fw Wig UNITED STATES "PATENT ()FFIOE.

OWEN JOHN PIT'IS CHICK, 0F TORONTO, ONTARIO, cA.NADA.

FORMING-TOOL.

To all whom it may concern:

Be it known that I, OWEN JOHN Prrrs Clucn, a subject of the King of Great Britain, residing at 'loronto, in'the county of York and Province of Ontario, Canada, have invented certain new anduseful Improvements in Forming-Tools, of which the age of the same; fourthly, to construct my forming tool so that the cutter may be given the desired adjustment; fifthly,-to provide a forming tool having a forming-cutter with its cutting edge of the desired shape and coextensive with the design to be given to the work, and thus 'absolutely prevent the finished article from having any ridges on'its surface, which will unavoidably result if a plurality of separate blades be used to form the cutter, and sixthly, to reduce the amount of steel required in the manufacture of forming tools.

' The construction of my preferred form of invention, and the alternative forms thereof,- will be described in the following specification, and the parts I claim as new will be pointed out in the claims forming part thereoli'.

' Figure l is a perspective view of my preferred form ot forming tool. Fig. 2 is a vertical cross-section on the line (e 1), Fig. 1. Fig. I; is a side elevation of one of the cutter holders shown in-l igs. l and 2. Fig. 4; is a perspective view of an alternative form of my invention. Fig. 5 is a planview of the cutter supported in the forming tool shown in Fig. l. p

in the drawings, like characters of reference indicate correspomling parts in each figure.

Tn order to change the configuration of the. cutting edge of forming toolsas now manut'aetured, i" is necessary to file the cutting edge so as to make it. conform to the desired eontiguratimi. and it is well known that this operation is a tedious and lengthy one. Now by means of my invention rny Specificatioh of Letters. Patent. Application filed May 1?, 1909. Serial No. 497,033.

Patented Aug. 9, 1910.

forming tool can be given any desircd'cut ting edge very quickly.

A is any suitable box or casing which is preferably provided with an open portion B. Positioned between the side walls C of said box or casing are the cutter holders D.

In the forms of my inventionshown in Figs.

1 to 4, the cutter holders are each provided witha longitudinal slot E; I Near the front of the box or casing, the side walls 0 are made higher-than elsewhere, as shown at F,

.and these portions F are connected together by a bridge Gr integrally formed therewith. Positioned underneath the bridge G and between the ortio'ns F, is a pressure bar H. By any suitable means, such as a pin I secured 111 said pressure bar, and extending up throu h the bridge G, the said pressure bar is held in-position. J are set screws held. in the bridge G and normally contacting the pressure bar H. N is the forming cutter which is made thin enough to be received by the slots E formed in the 'cutter holders D. \Vhen the cutter holders 1) have been adjusted as hereinafter particularly described, in order to give proper support to the forming cutter, the said forming cutter is inserted in the slotsE, and the set screwsJ are then screwed down, thus causing the pressure bar H to press down upon said'cutter holders and so clamp tightly in place the forming cutter. The tool is now ready to be used after the usual manner. The said box or casing is provided with a threaded stem 0 which passes through the head P of the arm Q. which arm is fixed in the tool post of the lathe or tool holder, (not shown) in the usual way. U is a nut screwing on the threaded stem 0. By the construction just deserihei'l it will be understood that the box or casing A can be adjusted around its stem 0. i Upon referring to Figs. 1 and at it will be seen that the cutter holders conform to the configuration of the cutting edge of the forming cutter, more or less, and are removed. far enough away from the edge of said forming tool as not to interfere with its working. By the parts before described the forming cutter is clamped tightly between the dividing portions 2 and '3 of the cutter holders, and therefore it will be understood that the said forming cutter is given the desired support so as to prevent same from breaking.

Should it be desired to replace the formin cutter N with a forming cutter having ,a di erent configuration of cutting edge, the set screws J are loosened so as to permit the forming cutter N to be removed. The form ing cutter to be used in place of the fo'rmin cutterN is then passed into the slot 4 formet l in the frame 5, which frame is pivoted b the pins 6 in the side walls G. IVhen the ormmg cutter has been positioned (see dotted lines Fig. 1) it is clamped in place by means of the .screw 7 held in the frame 5. The set screw 8, the function of which will be hereinaftcr described is loosened after the removal of the forming cutter N, and as the set screws J have already been loosened, it

cutting edge thereof to be properly supported. The set-screws J are then tightened up and the tool is then ready to be used.

By making a slot 9 in one or both of the side walls C near the front ends, it will be understood that I can make use of the box or casing A to ive support to a forming cutter which is wider than the width over all of the cutter holders D.

In the alternative-form of my invention shown in Fig. 4, the box or casing A is integrally formed with the arm Q and therefore the said box or casing has not the range of adjusting movement possessedby the box or casing shown in Fig. 1. In this alternative form of my tool, the pressure bar H is provided, as are also the set-screws J and .8. One of the cutter-holders 10 of the cutter-holders D is provided with an offset 11.

This cutter hol er is a means that I may employ in place 0 the slot9 (see Fig. 1) for giving proper support to an overhanging portion 12 of the forming cutter N It will be noticed upon referring to the drawings that the "cutter holders D andD extend above the ,top of the 'walls C so that the forming cutter will be easily positioned in their path ofinovement when they are to be adjusted so as to give their front ends the desired configuration.

The screws 7 in Fig. 4 are used for the same purpose as the screws 7, Fig. 1. The forming cutters used with the form of my invention shown in Fig. 4, for instance the forming cutter N, are each provided with a hole 15 to receive the screws 7 monts of the prior artand the In order to hold the.

. It will be noticed that the front edges 16 of the portions 2 .of the cutter holders are sloped backward, thus providing a clearance for the metal shavings. V

From the foregoing specification it will be understood that as the cutter is formed integrally, there will be noapossible, chance of its cutting edge leaving ri ges onthe surface of the article.

\Vhile I have described what I consider to be the best embodiment of my invention, I desire to be understood that the principles can be embodied in different forms, and'I desire not to be limited beyond the requireclaims. A

What I claim as my invention is:

- 1. As a new article of manufacture, a

terms of my forming-tool comprising a support; a plurality of movable slotted cutter-holders held therein, and a forming-cutter comprising a blade held inthe slots of said cutter-holders, and having itscutting-edge extending beyond the same." 7

2 A formin casin aplura mova l ity. of longitudinally-slotted slots "of said cutter-ho ders and having".its

tool comprising a box orecutter holders adjustablyyheld in said casing; a formin cuttr held' in the' cutter holders, and means for clamping theg said cutter holdersand forming cutter in place. a a 3. A formin tool comprising a box-ior casingprovide a ing bridge; a plurality of longitudinally slotted movable cutter holders adjustably held in said casing; a 'forming cutter held in the slots of sai cutter holders and having its edge extending beyond the front ends of said cutter holders; a pressure bar positioned underneath said br dge and normally resting upon said cutter holders, and means for clamping said pressure bar down upon said cutter holders so as to hQld the same and said forming cutter firmly 'in position.

4. A formin tool comprisipg a box or casino provided with a transversely extending bridge; a plurality of longitudinally slotted movable cutter holders adjustably held in said casin a formin cutter held in the slots of sai cutter hol ers and having its edge extending beyond the frontends with a transversely extend;

of said cutter holders; :1. pressure bar positioned underneath said brid e and normally resting upon said cutter hol ers; means car-- ricd by the side of said box or casing in order to clamp said cutter holders in their adjusted position while the said forming cutter is placed; and means for clamping said pressure bar down upon said cutter holders so asto hold the same and said forming cutter firmly in position.

5. A formin tool comprising a box or casing; a plura ity of -longitudinally slotted movable cutter holders adjustably held in said casing; a forming cutter held in the slots of said cutter holders and having its edge extending beyond the front ends of said cutter holders; a slotted frame pivoted to said box or casing near the rear end thereof and designed to hold the forming cutter in position while the cutter holders are given the desired configuration at their outer ends; a set screwcarried by said slotted frame; clamping means carried by said box or casing so as to hold said cutter-holders in their adjusted position when the forming cutter is being inserted in the tool,and means for clamping said cutter-holders-and' said forming cutter firml in place.

6. A forming too comprising a box or casing; a plurality of longitudinally slotted movable cutter holders adjustably held in said casing, and having their rear ends constructed so that the said cutter holders may be reversed and positioned so as to be used as cutters; a forming cutter held in the slots of said cutter holders and having its edge extending beyond the front ends of said cutter holders, and means for clamping the said cutter holders and forming cutter in place.

7. A forming tool comprising a oox or casing; a plurality of longitudinally slotted movable cutter holders adjustably held in said casing, and having the front ends of their upper portions cut off at a backward inclined angle; a forming cutter held in the slots of said cutter holders and having its edge extendin beyond the front ends of said cutter hol ers, and means for clamping the said cutter holders and forming cutter in place.

8. A forming tool' comprising a boxer casing provided in one of its sides at its front end with a horizontal slot; a plurality of movable cutter-holders adjustably held in said casing being each provided with a longitudinal slot which is in alinement with the slot formed in said casing; a forming cutter held in the slots of said cutter holders and in the slot formed in said casing and having its cutting edge extending beyond the edge of said cutter holders, and means for clampingsaid cutter holders and forming cutter in place.

9. As anew article of manufacture, a forming-tool comprising a support; a formlug-cutter carried by said support; a plurality of individually-movable supports carried bysaid support and designed to be held therein so as to give support to the cutting edge of said forming cutter, and means whereby said movable supports are firmly held in position.

' In testimony whereof I have alfixed my signature in presence of two witnesses.

OWEN JOHN PITTS CRICK.

\Vitnesses:

WM. S. JORDAN, D. S. 'Iovnnn. 

